Yet another P0305 Cylinder 5 Misfire Problem, Ram 1500 Hemi
Professional
Joined: Nov 2019
Posts: 196
Likes: 14
Sorry, I forgot to closeout this thread... It ended up being that the exhaust valve seat was dropping and wouldn't let the
valve close all the way. I was able to discover this by pulling the valve cover and having someone cranking the engine.
You could see the rocker was not moving as far as the others.
Ended up having to pull the heads, it was a major disassemble to replace them. If your going to replace the heads,
get aftermarket exhaust stud/bolts and make sure your machine shop guy peens the edge of he valve seats to keep them
from working there way out.
valve close all the way. I was able to discover this by pulling the valve cover and having someone cranking the engine.
You could see the rocker was not moving as far as the others.
Ended up having to pull the heads, it was a major disassemble to replace them. If your going to replace the heads,
get aftermarket exhaust stud/bolts and make sure your machine shop guy peens the edge of he valve seats to keep them
from working there way out.
I just bought an used 2016 ram 1500 5.7L, the lifters rattle way way to much for me. I think that its a lifter issue.
Administrator
Joined: Apr 2010
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From: Clayton MI
Usually valves don't get bent unless something hits them.... like, a piston... which is never a good scene. Of course, on the 5.7, it may just be a dropped valve seat. Pull the heads, see what ya got. (gotta pull 'em anyway to change the lifters.)
Professional
Joined: Nov 2019
Posts: 196
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I wonder if the valve guide might have stuck a valve. Sure hope its not a failure of the variable valve timing mechanism.
I sure noticed that my 2016 hemi lifters sure rattle more in the newish truck than my 2001 ram 1500 5.2L with 300000 miles on the clock. Such a same. I hate vehicles that make funny engine noises.
I sure noticed that my 2016 hemi lifters sure rattle more in the newish truck than my 2001 ram 1500 5.2L with 300000 miles on the clock. Such a same. I hate vehicles that make funny engine noises.
Registered User
Joined: Jan 2021
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Currently I'm working on my neighbor's 2013 Hemi with right at 100,000 miles that has the p0305 code. It does seem to have a tick on the drivers side. Last night while driving it slow it almost seemed like a loud diesel clang this went away with higher rpm. So far the spark plugs have been replaced. Coils swapped. Injectors were pulled and ultra sonically cleaned and tested. It seems to run ok until hard acceleration then it starts to miss and throws the p0305 code. With my scanner I can live stream the injector pulses. Everything looks ok until heavy acceleration then number 5 just goes dead. This seems to last for a minute or two then it will come back to life. The injectors have been swapped also. Any help would be greatly appreciated.
Was you able to figure this out My 2012 Ram 5.7 is doing just that.
im having the same issue with my 2010 rt Callenger. Keeps blowing the coil on cylinder 4 with p0304 and p2311 code
Registered User
Joined: Jun 2021
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Did you ever get this figured out? Mine is doing just this. Swapped coils, plugs etc… Runs great unless I accelerate hard then light flashes and truck runs terrible for a minute.
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Joined: Aug 2022
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Last edited by Ken81; Aug 6, 2022 at 08:14 PM.
Dood, I appreciate your input. I'll definitely try your solution first! But I could barely read or understand your post! I had to sit in my rocking chair, out on my front porch, and read it with a BIG southern accent, a large piece of straw hanging out of my mouth, and my eyes all blurry! lol 😆 No disrespect, just picking fun. Proud southern redneck here!
